安装黄金价格查询,金价报价工具!
黄金白银历史价格
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005
2004
2003
2002
2001
2000
1999
1998
1997
1996
1995
1994
1993
1992
1991
1990
1989
1988
1987
1986
1985
1984
1983
1982
1981
1980
1979
1978
1977
1976
1975
1974
1973
1972
1971
1970
1969
1968
|
1994/03/11
| 美元/金衡盎司 | |
| Gold | 387.1 | |
| Silver | 544.5 |
Gold 黄金价格历史图表和图形
最近360天走势图 ,
1 Ounce Gold=? USD
Silver 银价历史图表和图形
最近360天走势图 ,
1 Ounce Silver=? USD
相关新闻:
- Safety Valves - GEA
GEA SVA safety valves are designed for installation as relief valves in the refrigerant cycles of industrial refrigeration systems By default safety valves are meant for protecting refrigeration systems and their components from excess pressure (see also EN 378 part 2)
- Safety valves - Danfoss
The safety relief valves provide critical pressure relief, ensuring protection and safety in refrigeration systems by preventing overpressure conditions
- SAFETY DEVICES FOR REFRIGERATING SYSTEMS - afaghiagt. com
Valves series 3030 are safety devices according to the defi nition given in Article 1, Point 2 1 3, 2nd dash of 97 23 EC Directive and are the subject of Article 3, Point 1 4 of aforesaid Directive ee valves above mentioned are standard type, unbalanced, direct-loaded safety valves
- Safety Relief Valve for Refrigeration Systems
Specific products include a wide variety of specialty valves, nozzles, and condensate traps
- SAFETY RELIEF VALVE - Parker Hannifin Corporation
Safety Relief Valves should be used to protect each refrigeration system pressure vessel that can be isolated by valves In many localities state or municipal codes govern selection and installation of Relief Valves Many are patterned after the ASME Boiler and Pressure Vessel Code and the ANSI ASHRAE 15-78 Safety Code for Mechanical Refrigeration
|
|
黄金价格,金价 ©2005-2009
|汇率换算汇率查询
|Currency Exchange Rate
|disclaimer
|